In a large bowl add the butter, sugar, vanilla sugar, and brown sugar.
Use an electric mixer and cream together.
Add the peanut butter and beat to combine.
Add each egg, one at a time; beat to combine.
In a bowl sift together the baking soda, salt, and flour.
Add that to the batter and mix in.
Refrigerate for 1-2 hours or overnight.
Preheat the oven to 350 degrees F.
Remove the brownie dough from the refrigerator.
Form the brownie batter into 1/2-inch balls.
Place in the freezer for 10 minutes.
Take the peanut butter dough out of the refrigerator.
Take out the brownie dough balls out of the freezer.
Roll the peanut butter dough into a 1 -inch ball.
Flatten the dough ball with the palm of your hand or back of a spatula.
Place the brownie dough ball int the center of the peanut butter dough.
Cover the brownie ball completely with the peanut butter dough ball.
Place the balls on a parchment paper covered cookie sheet and flatten slightly.
Bake for 10-12 minutes.
Cool on a baking rack.
ENJOY